Recent experiments conducted in the Rotor Force Test Facility at the California Institute of Technology have examined the effects of a tip leakage restriction and swirl brakes on the rotordynamic forces due to leakage flows on arl impeller undergoing a prescribed circular whirl. The experiments simulate the leakage flow conditions and geometry of the Alternate Turbopump Design (ATE)) of the Spa...

We are concerned here with confined, axisymmetric flows of small viscosity driven by a prescribed Lorentz force. In a previous paper we examined the case where the body force is purely azimuthal, generating a swirling motion. We showed that, in such cases, Ekman pumping provides the means by which the flow establishes a steady state. In this paper we examine a problem which, superficially, look...

During the continuous casting of steel, transient flow events can be very important to the generation of quality problems. These transient phenomena can be computationally modeled using Large Eddy Simulation (LES) models while conventional K-ε models yield time-averaged results. Recently, Particle Image Velocimetry (PIV) has been applied to measure quantitatively the transient velocity fields i...

The paper investigates the impact of heat release and pilot jet location on the swirling flow structures in a coannular swirl burner without confinement. Two iso-thermal turbulent swirling flow cases and three turbulent premixed swirling flames are studied with the aid of large-eddy simulation. Two geometries are considered, one featuring a pilot lance flush with the outlet and one with retract...

Stream surfaces are a classic flow visualization technique used to portray the characteristics of vector fields, and texture advection research has made rapid advances in recent years. We present a novel hybrid visualization of texture advection on stream surfaces. This approach conveys properties of the vector field that stream surfaces alone cannot. We apply the visualization technique to var...

the aim of the present study was to investigate the influence of nozzle configurations on spray drift and explain the influences using several atomization characteristics (length of spray sheet, spray angle, velocity distribution of flow field, fluctuation of velocity, and droplet size). nozzles manufactured by one company (lechler gmbh, germany) were tested by spraying local tap water in a win...

A network flow watermarking scheme attempts to manipulate the statistical properties of a flow of packets to insert a “mark” making it easier to detect the flow after passing through one or more relay hosts. Because an attacker that is willing to tolerate delay can (nearly) always eliminate such marks, recent schemes have concentrated on making the marks “invisible” so that a passive attacker c...

This paper presents the results of numerical simulations for developed and discussed conical two-phase atomizers with swirl flow, differing in ratio height chamber to its diameter. Experiments were carried out SAN-1 HS/DS = 1 SAN-2 4 atomizers. The study was conducted over a range Reynolds number liquid ReL (1400; 5650) gas ReG (2970; 9900). Numerical calculations performed use computational fl...